html rendering is nowhere near fast enough, when building rich interfaces ensuring the ui is responsive while having to modify it extensively can be really real

html rendering is nowhere near fast enough, when building rich interfaces ensuring the ui is responsive while having to modify it extensively can be really really hard, if we still have to use tricks like optimising css selectors, using fragments to remove and add stuff from the dom and absolutely positioning everything because triggering redraw is still the bottleneck then I dont think rendering is near fast enough yet.